#!/bin/sh
# pass an arbitrary number of additional arguments to borg create by using
# borgbackup.sh $option1 $option2 ... $optionN
#   pass -v --stats to show more information
#   pass --list --filter AME to show all fiels Added Modified or with Error

export BORG_RSH='ssh -i {{ borgbackup_ssh_id }}'
export BORG_PASSPHRASE='{{ borgbackup_passphrase }}'
export BORG_REPO='{{ borgbackup_repo }}'

# some helpers and error handling:
info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM


# Backup the most important directories
borg create                                 \
    $@                                      \
    --compression lz4                       \
    --exclude-caches                        \
    --exclude '/home/*/.cache/*'            \
    --exclude '/var/run'                    \
    --exclude '/var/cache/*'                \
    --exclude '/var/tmp/*'                  \
    --exclude '/var/lib/apt/*'              \
    --exclude '/var/lib/dpkg/*'             \
    --exclude '/var/lib/yum/*'              \
    --exclude '/var/lib/docker/overlay2'    \
    --exclude '/var/lib/docker/containers'  \
    --exclude '/var/lib/docker/image'       \
    --exclude '/var/lib/docker/tmp'         \
    --exclude '/var/lib/lxcfs'              \
    --exclude '/var/log/*'                  \
                                            \
    $BORG_REPO::'{{ borgbackup_hostname }}-{now:%Y%m%d_%H%M}' \
    /etc                                    \
    /var                                    \
    /usr/lib                                \
    /usr/local/etc                          \
    /root                                   \
    /home                                   \

backup_exit=$?


# Prune old backups: keep 7 daily, 3 weekly and 2 monthly (3 months total)
borg prune                          \
    --glob-archives '{{ borgbackup_hostname }}-*' \
    --keep-daily    7               \
    --keep-weekly   3               \
    --keep-monthly  2

prune_exit=$?

# use highest exit code as global exit code
global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))

if [ ${global_exit} -eq 1 ];
then
    info "Backup and/or Prune finished with a warning"
fi

if [ ${global_exit} -gt 1 ];
then
    info "Backup and/or Prune finished with an error"
fi

exit ${global_exit}